Module for oven with modular structure and oven with modular structure

Abstract

Described is a module (100) for a modular oven for drying at least one continuous sheet, in particular an at least partly metallic continuous sheet intended to define electrodes of batteries of the jelly roll or pouch type. The module (100) comprises heating means for heating a continuous sheet and a box-shaped structure (101), delimiting an internal space (V), defined by a plurality of panels (1, 2, 3) welded to each other at respective welding edges to define a hermetic seal at the welding edges. Moreover, at least the side panels (1) define internally a respective gap at least partly filled with at least one thermally insulating material. At least one front panel (2) and at least one rear panel (3) comprise respective inlet openings (2a) and outlet openings, in such a way that a continuous sheet passes through the inlet openings (2a) and outlet openings passing through the internal space (V).

Description

[0001] DESCRIPTION

[0002] MODULE FOR OVEN WITH MODULAR STRUCTURE AND OVEN WITH MODULAR STRUCTURE.

[0003] Technical field

[0004] This invention relates to a module for an oven with a modular structure for drying at least one continuous sheet.

[0005] Background art

[0006] In particular, the invention relates to a module for an oven with a modular structure for drying a continuous sheet intended to define an electrode of a battery, for example a battery of the jelly roll pe, or a battery of the pouch type.

[0007] There are prior art ovens for drying sheets of tobacco comprising a loadbearing structure, generally metallic, on which are mounted insulating panels to define a box-shaped structure.

[0008] In detail, the box-shaped structure defines an internal space of the oven and the panels are configured for making a thermal insulation between the internal space and the outside environment.

[0009] Although this type of prior art oven is functional for drying sheets of tobacco, the Applicant has noted that this technology is not suitable for drying a continuous sheet intended to define an electrode of a battery, for example a battery of the jelly roll type, or of the pouch type.

[0010] In detail, a continuous sheet intended to define an electrode of a battery is at least partly made of metallic material and has zones provided with additional materials, for example layers in the form of paste or material to be dried, for the purpose of performing the function of an electrode. The heating of this material may generate dust and / or vapours which are contaminating for the environment and are therefore unsuitable for being released outside the oven without adequate filtration.

[0011] In addition, the material to be dried may be subject to alteration if in contact with air, in particular at operating temperatures of the oven, for example subject to oxidation. It is therefore essential to avoid communication between the inside environment (that is to say, the inside of the oven in which the material is positioned to be dried) and the outside environment, since the presence of oxygen deriving from the outside environment would trigger oxidisation processes problematic for the drying process.

[0012] The ovens of known type comprise a thermal insulation of the respective internal space, allowing, however, normal leaks between the outside and the inside of the internal space and are therefore not suitable for the selected use.

[0013] In addition, the traditional ovens have a poor assembly versatility, since the geometry which can be made is constrained by the load-bearing structure on which the panels are mounted.

[0014] Disclosure of the invention

[0015] In this context, the technical purpose of this invention is to provide a module for an oven with a modular structure for drying a continuous sheet intended to define an electrode of a battery which is free of the drawbacks of the prior art.

[0016] The aim of the invention is therefore to provide a module which allows a product to be obtained with a satisfactory quality.

[0017] In the context of the same technical purpose, the aim of the invention is also to provide a module which complies with strict requirements for emissions of pollutants or contaminants. The aim of the invention is also to provide a module which allows a high level of installation flexibility, in particular which is not constrained to a predetermined geometry.

[0018] In particular, the Applicant has noted that by welding between adjacent panels of a module for an oven for drying continuous sheets, made in such a way as to define a hermetic seal (except for small openings for the passage of the sheet), it is possible to obtain a satisfactory quality of drying of a sheet at least partly metallic.

[0019] In effect, a hermetic seal obtained by welding contributes to creating a controlled and uniform environment inside the oven, which is crucial for a high quality drying process. In particular, the heat distribution is more homogeneous, reducing the risk of hot or cold points which could cause non-uniform drying of the sheet. The hermetic seal also allows an increase in the speed of the sheet without adversely affecting the quality of the drying, thus also improving the productivity.

[0020] In addition, the Applicant has noted that the welding between adjacent panels, as well as a hermetic seal, defines a self-supporting structure of the module, which is more resistant and stable than a non-welded assembly. In particular, a welded structure is less subject to deformation and movement over time, maintaining the integrity of the oven even under harsh operating conditions, and reducing the need for maintenance and repairs, since the welded joints are less prone to wear or loosen than the mechanical joints.

[0021] The Applicant has also noted that it is possible to make a weld of another type between adjacent panels, such as, for example, an intermittent or non-hermetic weld, creating a hermetic seal using welds interposed between adjacent panels.

[0022] The invention relates to a module for ovens with a modular structure according to claim 1 and / or with one or more of the claims dependent thereon.

[0023] The invention also relates to a modular oven according to claim 12 and / or with one or more of the claims dependent thereon, a method for making the module according to claim 14 and / or with one or more of the claims dependent thereon, and a method for making the panel according to claim 20 and / or with one or more of the claims dependent thereon.

[0024] Further features and advantages of the invention are more apparent in the non-limiting description which follows of a preferred non-limiting embodiment of a module for an oven with a modular structure for drying a continuous sheet intended to define an electrode of a battery as illustrated in the accompanying drawings.

[0025] Brief description of drawings

[0026] The description is set out below with reference to the accompanying drawings which are provided solely for purposes of illustration without restricting the scope of the invention and in which:

[0027] - Figure 1 is a schematic exploded view of a module according to the invention;

[0028] - Figure 2 is a cross section view, according to a horizontal plane and with some components removed, of the module of Figure 1 ;

[0029] - Figure 3 is a cross section of a panel forming part of the oven of Figure 1 , in a horizontal plane and with some parts removed;

[0030] - Figure 4 is an enlarged view of a detail of Figure 2;

[0031] - Figure 5 shows an end portion of the oven of Figure 1 ;

[0032] - Figure 6 shows an oven made using modules made according to the invention.

[0033] Detailed description of preferred embodiments of the invention

[0034] In the context of this description, the reference numeral 100 has been used to indicate in its entirety a module for an oven with a modular structure for drying at least one continuous sheet, in particular a continuous sheet which is at least partly metallic intended to define electrodes for batteries, for example for batteries of the jelly roll type, or for batteries of the pouch type.

[0035] The sheets, used for example for the production of electrodes for lithium- ion batteries, are formed by a continuous substrate made of metallic material on which zones are arranged, which are continuous or separate, suitable for defining additional layers on one or both sides of the substrate. These deposited zones are formed, for example, by a semi-liquid or pasty material having a composition suitable for the function to be performed, and which requires drying.

[0036] As shown in Figures 1 and 2, the module 100 comprises a box-shaped structure 101 defined by a plurality of panels 1 , 2, 3 and delimiting an internal space “V”. The term “box-shaped” means a polyhedral shape, for example parallelepiped in shape.

[0037] In detail, the panels 1 , 2, 3 comprise a plurality of side panels 1 , defining an upper and lower side portion of the module 100.

[0038] The panels 1 , 2, 3 also comprise at least one front panel 2 and at least one rear panel 3, defining, respectively, a front portion and a rear portion of the module 100. In other words, the front 2 and rear 3 panels define end portions of the module 100.

[0039] The front panel 2 has at least one inlet opening 2a for a continuous sheet “N” and the rear panel 3 has at least one outlet opening 3a for the continuous sheet “N”.

[0040] The inlet opening 2a and the outlet opening 3a can be passed through by the continuous sheet "N", allowing a transit of the continuous sheet "N" through the internal space "V".

[0041] In other words, the inlet opening 2a and the outlet opening 3a define an inlet portion and an outlet portion (for the continuous sheet "N") of the module 100.

[0042] Preferably, the module 100 comprises at least one support 4 positioned inside the internal space ‘V’ in such a way as to define at least one heating path ‘R’, illustrated by an arrow in Figure 2.

[0043] In detail, the support 4 is configured for supporting and / or guiding the continuous sheet "N", received from the inlet opening 2a, advancing along the heating path "R" towards the outlet opening 3a.

[0044] For example, each support 4 may be made in the form of a conveyor roller, which is idle or motor-driven, or by other prior art systems.

[0045] If the continuous sheet "N" is able to support itself, the module 100 preferably does not have the support 4. The module 100 comprises, or is connectable to, heating means (not illustrated in the accompanying drawings) which can be operated for heating the continuous sheet "N" passing through the internal space "V".

[0046] For this reason, the heating means are thermally active on the internal space "V" to determine a thermal gradient inside it, in such a way as to heat the continuous sheet "N" passing through the internal space "V".

[0047] For example, the heating means are suitable for heating by irradiation and / or other prior art systems and may be integrated in the module 100 or be made separately and be operatively connected to the module 100.

[0048] At least the side panels 1 , and preferably all the panels 1 , 2, 3, are connected to each other in such a way as to form a hermetic seal between adjacent panels 1 , 2, 3. Preferably, all the panels 1 , 2, 3 are connected to each other by welding in such a way as to define a hermetic seal between all the adjacent panels 1 , 2, 3. In other words, the welding is not limited only to adjacent side panels 1 , but also includes the welding of the side panels 1 to the front panel 2 and to the rear panel 3. This type of welding guarantees that the entire box-shaped structure 101 is hermetically sealed, except for the small inlet 2a and outlet 3a openings for the continuous sheet "N". This configuration further improves the thermal efficiency of the oven, minimising heat losses through the joints of the panels and ensuring a uniform distribution of the temperature inside the space “V”. The robustness of the structure is also enhanced, since the welding creates a solid and stable connection between all the panels 1 , 2, 3, giving the module 100 a greater operational strength and durability.

[0049] In more detail, the panels are welded to each other at respective welding edges 5 (illustrated schematically in Figure 2) to define a hermetic seal at the welding edges 5. The welding edges are therefore preferably continuous and / or define a network of welding lines extending without interruption along the joints between the panels.

[0050] For this reason, the welding edges 5 prevent the formation of any zones of communication between the internal space “V” of the module 100 and the environment outside the module 100, preventing leaks of air and / or fumes from the inside towards the outside and vice versa.

[0051] In addition, advantageously, the welding edges 5 define a self-supporting box-shaped structure 101.

[0052] According to an aspect of the invention, the module 100 does not have a load-bearing frame since the panels 1 , 2, 3 welded to each other give the box-shaped structure 101 a self-supporting configuration.

[0053] The module 100 consequently gives an assembly versatility with the possibility of different configurations of the module, as it is not constrained to the geometry of a specific load-bearing structure.

[0054] According to an aspect of the invention, the welding edges 5 are defined by internal edges of the panels 1 , 2, 3 facing the internal space “V”, and have a hermetic seal and preferably a continuous seal.

[0055] Moreover, preferably, the external edges of the panels 1 , 2, 3, opposite the above-mentioned internal edges, have a weld in stretches.

[0056] According to an aspect of the invention, the module 100 may comprise, in addition or alternatively to the above-mentioned hermetic seals, at least one gasket 6 interposed between adjacent panels 1 , 2, 3.

[0057] The gasket 6 is able to contribute to the hermetic seal made by the welding edges 5 or to define itself the hermetic seal.

[0058] Preferably, the gasket 6 is inserted in a peripheral recess 6a of one of the adjacent panels 1 , 2, 3.

[0059] In other words, as illustrated in Figure 4, at least a first panel 1 of a pair of adjacent panels has a respective peripheral recess 6a which, in the configuration of connection between the adjacent panels, defines a closed housing seat for the gasket 6.

[0060] For this reason, the gasket 6 is designed to occlude a space between a pair of adjacent panels 1 , 2, 3, in such a way as to prevent any leaks.

[0061] It is possible to provide gaskets 6 in all the joining zones between the panels 1 , 2, 3 in such a way as to form a hermetic seal substantially on the entire surface of the module 100. Preferably, the rear panel 3 is fixed to the side panels 1 adjacent thereto by bolting, and at least one gasket 6 is interposed between the side panels 1 and the rear panel 3 in such a way as to form a hermetic seal between them, which would otherwise not be obtainable by bolting.

[0062] Moreover, preferably, the front panel 2 is hermetically sealed with the side panels 1 adjacent to it at respective inner edges (facing the internal space “V”) and the module 100 does not have a gasket 6 interposed between the side panels 1 and the front panel 2.

[0063] In accordance with an aspect of the invention, each panel 1 , 2, 3 comprises a base wall “B” (visible in Figure 2), facing the internal space “V” and made of stainless steel.

[0064] A base wall "B" made of stainless steel is resistant both to heat (generated by the heating means or during production of the connecting welds between the panels 1 , 2, 3), and to a corrosion caused by vapours produced by the continuous sheet "N" at least partly metallic drying in the internal space "V", or caused by dust produced by the continuous sheet "N", or both the previous causes.

[0065] Preferably, the remaining part of each panel 1 , 2, 3 is made of a different material, in particular carbon steel. Moreover, preferably, the part of each panel 1 , 2, 3 facing towards the outside, that is to say, opposite the part of each panel 1 , 2, 3 facing the internal space “V”, is painted.

[0066] Each of the panels 1 , 2 is preferably defined by at least one pair of plates “L1”, “L2” welded to each other.

[0067] As shown in Figures 2 and 3, at least the side panels 1 , and preferably all the panels 1 , 2, 3, have inside a respective gap “I”.

[0068] In other words, at least the side panels 1 have a sheet metal structure which is hollow inside.

[0069] The gap “I” is at least partly filled with at least one thermally insulating material 200. The thermally insulating material 200 allows a thermal insulation to be improved between the internal space “V” of the module 100 and the environment outside the module 100.

[0070] For this reason, at least the side panels 1 , and preferably all the panels 1 , 2, 3, are thermally insulating.

[0071] Preferably, the thermally insulating material 200 defines a substantially complete filling of the cavity “I”.

[0072] According to an aspect of the invention, the thermally insulating material 200 positioned in the gap “I” of the side panels 1 , and preferably of all the panels 1 , 2, 3, comprises at least one layer of rock wool 201 positioned inside a portion of the gap “I” proximal to the internal space “V”, as illustrated in Figure 3, therefore adjacent to the base wall “B”.

[0073] Preferably, the layer of rock wool 201 has a thickness equal to or less than 50% of the thickness of the gap “I”, more preferably equal to or less than 30%.

[0074] The layer of rock wool 201 guarantees a thermal insulation of the internal space “V” of the module 100.

[0075] During a step of production of the module 100, the arrangement of the layer of rock wool 201 proximal to the internal space “V” guarantees that a welding between adjacent panels 1 , 2, 3 at walls facing towards the internal space “V” does not damage further any layers of insulating material 200 positioned inside the gap “I”.

[0076] According to an aspect of the invention, the thermally insulating material 200 positioned in the gap “I” of the side panels 1 , and preferably of all the panels 1 , 2, 3, also comprises a layer of expanded polyurethane foam 202.

[0077] Preferably, at least the side panels 1 comprise at least one respective injection hole 7, designed to allow an injection of a foam, for example polyurethane, during a production step of the module 100, or of the panel 1. The expansion of the foam allows a substantially complete filling of the gap, with substantial elimination of empty spaces which could generate localised reductions in the thermal insulation.

[0078] Preferably, the layer of expanded polyurethane foam 202 is superposed on the layer of rock wool 201 and positioned in a distal position relative to the internal space “V” of the module 100.

[0079] According to an aspect of the invention, at least one of the side panels 1 , and preferably each panel 1 , 2, 3, comprises inside the respective gap “I” at least one respective reinforcing element 8, positioned in contact against opposite main walls of the panel 1 and visible in Figure 3.

[0080] The term “main walls” of the panel means walls defining a portion of greater extension of the panel, that is to say, a relative length and width, therefore the above-mentioned base wall “B” and the wall opposite and parallel to it.

[0081] The reinforcing element 8 is fixed, in particular welded, to at least one of the main opposite walls, to define an inner stiffening rib of the panel 1 .

[0082] According to an embodiment, the reinforcing element 8 comprises a perforated metal crosspiece 8a, made of thin sheet preferably comprising a plurality of through openings.

[0083] More preferably, the through openings occupy at least 30% of the reinforcing element 8, even more preferably the through openings occupy at least 50% of the reinforcing element 8.

[0084] The presence of one or more reinforcement elements 8 in a panel 1 , 2, 3 separates the gap “I” into chambers connected to each other by the through openings of the reinforcement elements 8.

[0085] In the case of injection of the insulating material 200, in detail of the foam expanded layer 202, during a production step of the panel 1 or the module 100, the through openings allow the insulating material 200 in a fluid or expanded form to pass through them reaching and filling all the chambers of the gap “I”.

[0086] In other words, the reinforcing element 8 allows both the definition of a stiffening rib of the panel 1 and the optimisation of the filling and thermal insulation of the panel 1 . According to a further embodiment, in the gap ‘I’ there are also longitudinal reinforcing elements 8b, perpendicular to the above-mentioned metal crosspieces 8a and defining a stiffening in a transversal direction. The longitudinal reinforcing elements 8b comprise, for example, flat metal profiles, preferably U-shaped, connected with shape coupling (reciprocal engagement) to the metal crosspieces 8a and fixed to one of the two main walls of the panel 1 , 2, 3. For example, in the case of a U-shaped profile, the longitudinal reinforcing element 8b has a base fixed to the main wall of the panel 1 , 2, 3 (for example, the wall opposite the base wall "B") and two parallel side flaps which engage in respective recesses or notches made in the metal crosspieces 8a. Such a configuration is shown in Figure 3.

[0087] More generally speaking, each side panel 1 may therefore comprise, inside the respective gap “I”, at least one crosspiece 8a and at least one profile 8b, positioned one transversally relative to the other. Preferably, the metal crosspiece 8a comprises a recess intended to receive the profile 8b, or vice versa.

[0088] According to an aspect of the invention, at least one side panel 1 comprises a respective inspection window 9 (shown in Figure 1 ) having a closure or hermetic seal.

[0089] The inspection window 9 allows “on view” monitoring, from the outside, of the continuous sheet "N" passing through the containment space "V".

[0090] Moreover, one or more side panels 1 may comprise one or more access doors, hermetically reclosable to allow access by an operator in the case of maintenance or operations. The doors may also be made with gaps filled with the insulating material, with the same methods as for the panels 1 , 2, 3.

[0091] In accordance with an aspect of the invention, the module 100 can be connected with an adjacent module 100 by means of a connection made at the inlet opening 2a and / or at the outlet opening 3a. Preferably, this connection has a hermetic seal.

[0092] Preferably, moreover, this connection is obtained by means of a gasket, more preferably annular, fixed to an end of the module 100, in particular around at least one between the inlet opening 2a and the outlet opening 3a. The gasket is suitable for defining a connection with a hermetic seal with an end of a further module 100, and in particular with at least one between the outlet opening 3a and the inlet opening 2a, in such a way as to connect the module 100 and the further module 100.

[0093] Preferably, the module 100 and the adjacent module 100 comprise respective housing seats (not illustrated in the accompanying drawings) intended to house respective tie rods, configured to stabilise the connection between the module 100 and an adjacent module 100.

[0094] In addition to the module 100 just described, this invention relates to an oven 300 with a modular structure for drying at least one continuous sheet "N", in particular a continuous sheet intended to define an electrode of a battery of the jelly roll or of the pouch type.

[0095] In particular, with reference to Figure 6, the oven 300 comprises a plurality of modules 100 connected to each other, preferably with a hermetic seal, at least at respective inlet 2a and outlet 3a openings.

[0096] In detail, the modules 100 are connected to each other by means of a connection with a hermetic seal, for example by means of the above- mentioned gasket interposed between the modules 100.

[0097] For this reason, the oven 300 thanks to the hermetically sealed connections between modules 100, and thanks to the modules 100 themselves, is able to prevent leaks between the internal space "V" and the environment outside the oven 300, guaranteeing an optimum heating action given by the suitable number of modules coupled to each other.

[0098] In accordance with an aspect of the invention, the oven 300 comprises at least one end module 301 visible in Figure 1 and in Figure 6.

[0099] The end module 301 is applied or applicable to a respective end module 100 of the plurality of modules 100 therefore defining an end of the oven 300.

[0100] For example, the end module 301 is applied to one end of the oven 300 by removable means (threaded connections, couplings, gripper systems), or by welding.

[0101] The end module 301 is configured for guiding the continuous sheet "N" entering the oven 300 or leaving the oven 300.

[0102] Preferably, the oven 300 comprises a first end module 301 positioned at a first end and configured for passing and / or guiding the continuous sheet "N" into the oven 300, and a second end module 301 positioned at a second end and configured for passing and / or guiding the continuous sheet "N" coming out from the oven 300.

[0103] According to an aspect of the invention, the end module 301 comprises a calibrated or calibratable opening for adapting to the thickness of the continuous sheet “N” in transit.

[0104] In particular, the calibrated or calibratable opening is defined by at least one adjustable shutter 301 a, or two shutters 301 a which can be adjusted relative to each other, in such a way as to define a passage slot “F” with dimensions which can be adjusted as a function of the thickness of the sheet “N”.

[0105] It is therefore possible to adjust the passage slot “F” in such a way that the continuous sheet “N” passes to size through the calibrated opening, reducing to a minimum the thickness of the transversal clearance and, therefore, any air leaks.

[0106] This invention also relates to a method for making the module 100.

[0107] The method for making the module 100 comprises an initial phase of providing a plurality of hollow panels 1 , 2, 3, each comprising a respective gap “I”, wherein the gap “I” is at least partly filled with at least one thermally insulating material 200.

[0108] The method therefore comprises assembling the panels 1 , 2, 3 prepared in order to define a box-shaped structure 101 delimiting an internal space “V” of the module 100.

[0109] In particular, the step of assembling the panels 1 , 2, 3 is performed by connecting the panels 1 , 2, 3 in such a way as to define a hermetic seal at the respective joints.

[0110] The hermetic seal is preferably achieved by welding together the panels 1 , 2, 3 at respective welding edges 5. The hermetic seal may alternatively, or in addition, be obtained by sealing gaskets interposed between adjacent panels and preferably configured to extend along the entire respective joining line between the panels.

[0111] According to an aspect of this invention, the panels 1 , 2, 3 are welded to each other in such a way that the panels 1 , 2, 3 welded to each other define a self-supporting box-shaped structure 101.

[0112] In other words, the step of assembling the panels 1 , 2, 3 is aimed at defining a box-shaped structure 101 which is able to support itself and perform a hermetic seal.

[0113] According to an embodiment, the method for making the module 100 comprises a step of preparing a plurality of panels 1 , 2, 3 comprising a base wall “B”, made of stainless steel, and the assembly step comprises facing the base wall “B” directly to the internal space “V” of the module 100 and welding together the panels 1 , 2, 3 at the respective base walls “B”. Preferably, the insulating material 200 comprises a layer of rock wool 201 adjacent to or in contact with the base wall “B”, and the step of welding the panels 1 , 2, 3 is performed by welding together the panels 1 , 2, 3 at respective welding edges 5 adjacent to the layer of rock wool 201 , in particular at the base walls “B”.

[0114] The method also comprises, before the step of assembling the panels 1 , 2, 3, or during the step of assembling the panels 1 , 2, 3, connecting to at least one of the panels 1 , 2, 3 heating means (not illustrated in the accompanying drawings) in such a way that the heating means are thermally active on the internal space “V” defined or definable by the panels 1 , 2, 3.

[0115] Alternatively, the method comprises, after the step for assembling the panels 1 , 2, 3, mounting on the box-shaped structure 101 heating means (not illustrated in the accompanying drawings) in such a way that the heating means are thermally active on the internal space “V”.

[0116] According to an aspect of the invention, the method also comprises a step of fixing at least one gasket, preferably at least one annular gasket, to an end of the module 100, in particular to at least one between the inlet opening 2a and the outlet opening 3a. In detail, the fixed gasket is suitable for defining a connection with a hermetic seal with an end of a further module 100, and in particular with at least one between the outlet opening 3a and the inlet opening 2a.

[0117] This invention also relates to a method for making a thermally insulating panel 1 , 2, 3, illustrated in a relative embodiment in Figure 3.

[0118] In particular, the panel made by the method described below is used in a module 100 described above and / or in the method for making the module 100.

[0119] The method comprises a step of providing a first sheet plate “L1 ”, made from metallic material, preferably carbon steel, and a second sheet plate “L2”, made from a material suitable for exposure to high temperatures and corrosion, preferably stainless steel.

[0120] Alternatively, the method may comprise preparing plates “L1 ”, “L2” made of same material (carbon steel, non-stainless steel, or stainless steel).

[0121] According to a relative embodiment, the method comprises a step of forming the first plate “L1” in such a way as to form at least one concavity of the first plate “L1 ”.

[0122] According to a relative embodiment, the method comprises a step of forming the second plate “L2” in such a way as to define a profile comprising at least one concavity of the second plate “L2”.

[0123] According to a relative embodiment, the method comprises a step of forming the first plate “L1” and the second plate “L2” in such a way as to define a profile comprising at least one concavity respectively of the first and second plate “L1 ”, “L2”.

[0124] For this reason, the method comprises a step for forming at least one between the first and second metal plates “L1 ”, “L2”, in such a way as to define a concave profile of the formed metal plate “L1 ”, “L2”.

[0125] The method comprises a step of installing a layer of thermally insulating material, preferably a layer of rock wool 201 , on one between the first and the second plate “L1 ”, “L2”, preferably on the second plate “L2”.

[0126] The method also comprises a step of welding the first metal plate “L1” to the second metal plate “L2” to define a panel 1 , 2, 3 comprising a respective gap “I”, in such a way that the layer of thermally insulating material is interposed between the first and second metal plates “L1 ”, “L2” to partially fill the gap “I”.

[0127] In other words, the step of welding the first and second plates “L1 ”, “L2” is achieved by orienting a concavity of the concave profile of the first and / or second plate “L1 ”, “L2” (obtained by means of the forming step) in such a way that it faces the other plate “L1 ”, “L2”, so as to define the gap “I”.

[0128] According to an aspect of the invention, the forming step is performed by forming the first and / or the second plates “L1 ”, “L2” in such a way as to define a peripheral recess 6a, respectively of the first and / or the second plate “L1 ”, “L2”, facing outwards.

[0129] Preferably, the forming step is performed by forming one of either the first or the second plate “L1 ”, “L2” in such a way as to define the peripheral recess 6a, intended to be positioned outside the gap “I”.

[0130] In detail, the peripheral recess 6a is intended to house a respective gasket 6 to be interposed between the panel 1 , 2, 3 and an adjacent panel, to define a connection with a hermetic seal between the two panels 1 , 2, 3.

[0131] According to an aspect of the invention, the method also comprises a step of welding at least one reinforcing element 8 to the first plate “L1” and / or to the second plate “L2”. In detail, the reinforcing element 8 is intended to define an inner rib (at the gap “I” of the panel 1 , 2, 3) for stiffening the panel 1 , 2, 3.

[0132] Preferably, the method comprises welding a profile 8b to the first plate “L1” and welding a metal crosspiece 8a to the second plate “L2” and, subsequently, coupling the two plates “L1 ”, “L2” preferably obtaining a shape coupling between the crosspiece 8a and the profile 8b.

[0133] In accordance with an aspect of the invention, the method comprises an injection step after the welding step.

[0134] In detail, after the welding step the method comprises injecting inside the gap “I” of the panels 1 , 2, 3 an expanding foam (polyurethane) through respective injection holes 7 present on the first and / or on the second plate “L1 ”, “L2”, preferably in a distal position relative to the layer of rock wool 201.

[0135] The injection step is aimed at defining a layer of polyurethane foam 202 inside the gap “I” for at least partly filling the gap “I”.

[0136] Preferably, the injection step is performed by positioning the panels 1 , 2, 3 in a mechanical press.

[0137] Preferably, the injection step is performed to define a layer of polyurethane foam 202 defining a substantially complete filling of the gap “I”.

[0138] The invention achieves the preset aims, overcoming the drawbacks of the prior art.

[0139] In particular, the module 100 has a hermetic structure which isolates the internal space from the outside, thereby optimising the maintaining of optimum conditions for drying and avoiding the emission of contaminating agents, which may be removed from the internal space by suitable removing means (for example one or more suction conduits leading to means for filtration and / or collection of fumes).

[0140] Moreover, the module 100 is provided with a self-supporting structure, increasing the assembly possibilities of the module 100.

[0141] The oven made using two or more of these modules is also advantageously optimised, since it is possible to add a desired number of modules obtaining an oven of desired length, optimised for the drying process to be obtained and at the same time suitable for separating the drying environment from the outside.

Claims

CLAIMS1. A module (100) for a modular oven for drying at least one continuous sheet (N), in particular an at least partly metallic continuous sheet intended to define electrodes of batteries of the jelly roll and / or pouch type, the module (100) comprising a box-shaped structure (101 ) defined by a plurality of panels (1 , 2, 3) and delimiting an internal space (V), the panels (1 , 2, 3) comprising a plurality of side panels (1 ), at least one front panel (2) and at least one rear panel (3), wherein the front panel (2) has at least one inlet opening (2a) for a continuous sheet (N) and the rear panel (3) has at least one outlet opening (3a) for the continuous sheet (N), so that the continuous sheet (N) passing through the inlet opening (2a) and the outlet opening (3a) traverses the internal space (V); wherein the module (100) comprises, or is connectable to, heating means for heating the continuous sheet (N) in transit through the internal space (V), wherein at least the side panels (1 ) are internally provided with a respective gap (I) that is at least partly filled with at least one thermally insulating material (200), and wherein the panels (1 , 2, 3) are welded to each other at respective welding edges (5) to define a hermetic seal at the welding edges (5).

2. The module (100) according to claim 1 , wherein the welding edges (5) are defined by internal edges of the panels (1 ) facing the internal space (V).

3. The module (100) according to claim 1 or 2, comprising at least one gasket (6) interposed between two adjacent panels (1 , 2, 3) to contribute to making the hermetic seal, the gasket (6) being preferably inserted in a peripheral recess (6a) of one of the panels (1 , 2, 3).

4. The module (100) according to any one of the preceding claims, wherein the module (100) does not have a load-bearing frame and wherein the panels (1 , 2, 3), which are welded to each other, give the boxshaped structure (101 ) a load-bearing configuration.

5. The module (100) according to any one of the preceding claims,wherein the panels (1 , 2, 3) each comprise a base wall (B), facing the internal space (V), made from stainless steel, and wherein the rest of the panel (1 , 2, 3) is made preferably from a different material, in particular carbon steel.

6. The module (100) according to any one of the preceding claims, wherein the thermally insulating material (200) comprises a layer of stone wool (201 ), disposed in a portion of the gap (I) proximal to the internal space (V), the layer of stone wool (201 ) preferably having a thickness which is less than or equal to 50% of the thickness of the gap (I), more preferably less than or equal to 30%.

7. The module (100) according to any one of the preceding claims, wherein the thermally insulating material (200) comprises a layer of polyurethane foam (202) injected or injectable into the gap (I) through at least one respective injection hole (7) made in the panel (1 , 2, 3).

8. The module (100) according to claims 6 and 7, wherein the layer of polyurethane foam (202) is overlaid on the layer of stone wool (201 ) and disposed at a distal position relative to the internal space (V), the layer of polyurethane foam (202) preferably defining a substantially complete filling of the portion of the gap (I) not filled by the layer of stone wool (201 ).

9. The module (100) according to any one of the preceding claims, wherein at least the side panels (1 ) comprise, inside the respective gap (I), at least one respective reinforcing element (8, 8a, 8b), abutted against opposite main walls of the panel (1 ) and fixed, in particular welded, to at least one of the opposite main walls to define internal stiffening ribs of the panel (1 ), the reinforcing element (8, 8a, 8b) comprising a plurality of through openings.

10. The module (100) according to any one of the preceding claims, wherein at least one side panel (1 ) comprises an inspection window (9) provided with a hermetic seal.

11. The module (100) according to any one of the preceding claims, wherein the module (100) is connectable to an adjacent module (100) by ahermetically sealed connection at the inlet opening (2a) and / or at the outlet opening (3a), the hermetically sealed connection being preferably defined by a gasket fixed to at least one of the inlet openings (2a) and / or outlet openings (3a).

12. A modular oven (300) for drying at least one continuous sheet (N), in particular, a continuous sheet (N) intended to define an electrode of a battery of the jelly roll and / or pouch type, the oven (300) comprising a plurality of modules (100) according to one or more of the preceding claims, the modules (100) being connected to each other by a hermetically sealed connection at least at the inlet openings (2a) and outlet openings (3a).

13. The oven (300) according to claim 12, comprising at least one end module (301 ) applied or applicable to a respective module (100) of the plurality of modules (100), intended to define an end of the oven (300) and configured to transfer a continuous sheet (N) into, or out from, the oven (300), the end module (301 ) comprising a calibrated or calibratable opening to adapt to the thickness of the continuous sheet (N) in transit, in particular the calibrated or calibratable opening being defined by a pair of shutters (301 a) adjustable relative to each other in such a way as to define a through slot (F) that is adjustable in size.

14. A method for making a module (100) according to any one of claims 1 to 11 , comprising the following steps:- providing a plurality of hollow panels (1 , 2, 3), each comprising a respective gap (I) which is at least partly filled with at least one thermally insulating material (200);- assembling the panels (1 , 2, 3) to define a box-shaped structure (101 ) delimiting an internal space (V);- mounting heating means on at least one of the panels and / or on the box-shaped structure (101 ) so that the heating means are thermally active on the internal space (V);wherein the step of assembling the panels (1 , 2, 3) is accomplished by welding the panels (1 , 2, 3) to each other at respective welding edges (5) to define a hermetic seal at the welding edges (5).

15. The method according to claim 14, wherein the step of assembling the panels (1 , 2, 3) comprises interposing at least one gasket (6) between two adjacent panels (1 , 2, 3) so as to contribute to making the hermetic seal, preferably by inserting the seal (6) into a peripheral recess (6a) of at least one of the two panels (1 , 2, 3).

16. The method according to claim 14 or 15, wherein the step of providing the panels (1 , 2, 3) is accomplished by providing panels (1 , 2, 3) comprising a base wall (B), made from stainless steel, intended, in use, to directly face the internal space (V), and wherein the step of assembling the panels (1 , 2, 3) is accomplished by welding the panels (1 , 2, 3) to each other at the base walls (B).

17. The method according to any one of claims 14-16, wherein the thermally insulating material (200) comprises a layer of stone wool (201 ), disposed in the gap (I), and wherein the step of welding the panels (1 , 2, 3) is accomplished by welding the panels (1 , 2, 3) to each other at respective welding edges (5) adjacent to the layer of stone wool (201 ).

18. The method according to any one of claims 14-17, comprising a step of fixing at least one gasket, preferably at least one annular gasket, at one end of the module (100), in particular to at least one between the inlet opening (2a) and the outlet opening (3a), the gasket being suitable for defining a hermetically sealed connection to one end of another module (100), and in particular to at least one between the outlet opening (3a) and the inlet opening (2a).

19. The method according to any one of claims 14-18, wherein the panels (1 , 2, 3) are welded to each other in such a way that the panels (1 , 2, 3), which are welded to each other, define a load-bearing, box-shaped structure (101 ).

20. A method for making a thermally insulating panel (1 , 2, 3), in particularused in a module according to any one of claims 1 to 11 and / or in a method according to any one of claims 14 to 19, comprising the following steps:- providing a first sheet plate (L1 ), made from metallic material, preferably carbon steel, and a second sheet plate (L2), made from a material suitable for exposure to high temperatures and corrosion, preferably stainless steel;- forming the first sheet plate (L1 ) and / or the second sheet plate (L2) in such a way as to define a profile comprising at least one concavity of the first sheet plate (L1 ) and / or of the second sheet plate (L2), respectively;- placing a layer of thermally insulating material, preferably a layer of stone wool (201 ), on the second sheet plate (L2);- welding the first sheet plate (L1 ) to the second sheet plate (L2) to define a panel (1 , 2, 3) comprising a gap (I) so that the layer of thermally insulating material is interposed between the first and the second sheet plate (L1 , L2) to partially fill the gap (I).

21. The method according to claim 20, wherein the step of forming is carried out by forming the first sheet plate (L1 ) and / or the second sheet plate (L2) in such a way as to define a recess (6a) in the first and / or the second sheet plate (L1 , L2) respectively, the recess (6a) being directed outward and intended to accommodate a respective gasket (6) to be interposed between the panel (1 , 2, 3) and an adjacent panel (1 , 2, 3).

22. The method according to claim 20 or 21 , wherein the step of welding is followed by a step of injecting a polyurethane foam into the gap (I) through respective injection holes (7) made in the first and / or the second sheet plate (L1 , L2), so as to form a layer of polyurethane foam (202) in the gap (I), the step of injecting being preferably accomplished by placing the panel (1 , 2, 3) in a mechanical press.

23. The method according to claim 22, wherein the step of injecting is accomplished by injecting a polyurethane foam defining a substantiallycomplete filling of the gap (I).

24. The method according to any one of claims 20 to 23, wherein the step of forming is followed by a step of welding at least one reinforcing element (8, 8a, 8b) to the first sheet plate (L1 ) and / or to the second sheet plate (L2), the reinforcing element (8, 8a, 8b) being intended to define internal stiffening ribs of the panel (1 , 2, 3) inside the gap (I).

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